has been unknown

USAGE SUMMARY

"has been unknown" is a correct and usable phrase in written English.
It is used to indicate that something has not been known or understood in the past, but may be known or understood now. Example: The source of the river's pollutants has been unknown until now.

✓ Grammatically correct

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

"It has been 22 days".

The New York Times - Tech

It has been 23 years, not 13.

The New York Times

It has been 10 years since.

The New York Times

It has been 13 years.

The Guardian - TV & Radio

It has been 58 days.

The Guardian

That conclusion has been 4 decades coming.

Science Magazine

He has been HS2 chairman since January.

BBC

yes, facebook has been 0wn3d.

TechCrunch

The average training has been 35 hours.

WikiHow

Could've been 30 seconds.

Independent

That would have been 2004".

The New Yorker

Expert writing Tips

Best practice

Use "has been unknown" to indicate that something's lack of knowledge persisted until recently, implying new information or discovery.

Common error

Avoid using "has been unknown" when a simpler phrase like "was unknown" suffices. The present perfect construction implies a relevance to the present that may not always be necessary.

Linguistic Context

The phrase "has been unknown" functions as a stative verb phrase, indicating a state of lacking knowledge or understanding about something up to a certain point in time. Based on Ludwig AI, this phrase is grammatically correct.

Expression frequency: Missing

Frequent in

Science

0%

News & Media

0%

Formal & Business

0%

Less common in

Science

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News & Media

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Formal & Business

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Ludwig's WRAP-UP

In summary, the phrase "has been unknown" is used to express that something lacked knowledge or understanding until recently. While grammatically correct, as confirmed by Ludwig AI, it's crucial to consider the context to determine if the present perfect tense is appropriate. Due to the limited number of examples, real-world usage patterns are difficult to ascertain, but its versatility allows it to be applied across various contexts. Alternatives like "remained a mystery" or "was not known" can offer nuanced shades of meaning depending on the intended message.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

was not known

A simpler and more direct way of stating that something was not known.

has been unclear

Indicates a lack of clarity rather than complete absence of knowledge.

remained a mystery

This alternative emphasizes the mysterious nature of something that was previously unknown.

was not understood

Focuses on the lack of comprehension regarding something.

has not been discovered

Focuses on the lack of discovery rather than general knowledge.

has not been revealed

Emphasizes that something was kept secret and not made public.

has eluded understanding

Highlights the difficulty in comprehending something.

has escaped detection

Highlights the fact that something has not been noticed or identified.

was shrouded in secrecy

Suggests that the lack of knowledge was due to intentional concealment.

has defied explanation

Indicates that something is so perplexing that it cannot be explained.

FAQs

How can I use "has been unknown" in a sentence?

You can use "has been unknown" to indicate that something was not known in the past but is now known or understood. For example, "The cause of the illness "has been unknown" until recent research identified a new virus".

What are some alternatives to "has been unknown"?

Some alternatives include "remained a mystery", "was not known", or "has not been discovered", depending on the specific context.

Which is correct, "has been unknown" or "was unknown"?

"Has been unknown" and "was unknown" are both grammatically correct, but they have slightly different meanings. "Was unknown" simply states that something was not known at a particular time in the past. "Has been unknown" implies that something remained unknown until recently.

What is the difference between "has been unknown" and "remains unknown"?

"Has been unknown" refers to a period in the past when something was not known, often implying that it is now known. "Remains unknown" indicates that something is still not known in the present.